dt-bindings: drm/msm: Update MDP bindings

Update DT bindings for mdp. We now have a more uniform and future-proof
set of compatible strings.

MDP5 bindings were missing. Add those and update details on the
clock-names properties.
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

Documentation/devicetree/bindings/display/msm/mdp.txt

@@ -2,18 +2,28 @@ Qualcomm adreno/snapdragon display controller
 
 Required properties:
 - compatible:
-  * "qcom,mdp" - mdp4
+  * "qcom,mdp4" - mdp4
+  * "qcom,mdp5" - mdp5
 - reg: Physical base address and length of the controller's registers.
 - interrupts: The interrupt signal from the display controller.
 - connectors: array of phandles for output device(s)
 - clocks: device clocks
   See ../clocks/clock-bindings.txt for details.
-- clock-names: the following clocks are required:
+- clock-names: the following clocks are required.
+  For MDP4:
    * "core_clk"
    * "iface_clk"
+   * "lut_clk"
    * "src_clk"
    * "hdmi_clk"
-  * "mpd_clk"
+   * "mdp_clk"
+  For MDP5:
+   * "bus_clk"
+   * "iface_clk"
+   * "core_clk_src"
+   * "core_clk"
+   * "lut_clk" (some MDP5 versions may not need this)
+   * "vsync_clk"
 
 Optional properties:
 - gpus: phandle for gpu device
@@ -26,7 +36,7 @@ Example:
 	...
 
 	mdp: qcom,mdp@5100000 {
-		compatible = "qcom,mdp";
+		compatible = "qcom,mdp4";
 		reg = <0x05100000 0xf0000>;
 		interrupts = <GIC_SPI 75 0>;
 		connectors = <&hdmi>;